Proector Kaolan is one of the NPCs that is part of the Protectors of the Endless raid encounter along with Elder Regail and Elder Asani. These three NPCs are the first "boss" of the Terrace of the Endless Spring. They are linked, and you fight them together in a council style fight. Each has unique abilities with Asani doing "water" type spells, Regail focusing on Lightning, and Koalan doing shadow damaging abilities. Although you fight all three at once, you will need to kill them one at a time because when one dies the others are healed to full.